Caster I have the Steeda 4-bolt items (aluminum), and am very pleased with them. They were not tough to install, although I had to massage the 4th hole a bit (drill) and have the car aligned afterwards, of course. I run the Steeda sport springs as well (superlite type), and they are wonders at introducing the right caster/camber settings. In all likelihood you don't really need the 4 bolt versions unless you're putting severe stress on your car. I chose the 4 bolters because I preferred their look and I drive a convt., which is not as rigid as a coupe and needs all the support it can get (I also use a strut brace from Steeda for that reason). Far as I can tell you get the same amount of adjustability with the 3 bolt versions, just not as strong and not any extra support. As for differences between the various manufacturers, my Steedas allow for a good amount of up and down adjustment (which allows me to raise or lower the front end about .6 inches or so).
Not familiar with the UPR items, but if money is the issue go with the 3 bolt. You might do some research into whether they can be adjusted like the Steeda and MM units. Maybe there's a reason why they cost less...
tripleblack |